<template>
    <div>
        <li>
            <label>
                <input type="checkbox" :checked="todo.done" @change="handleCheck(todo.id)"/>
                <!-- 如下代码也能实现功能，但不太推荐，因为有点违反原则，因为修改了props -->
                <!-- <input type="checkbox" v-model="todo.done"/> -->
                <span>{{todo.title}}</span>
            </label>
            <button class="btn btn-danger" @click="handleDelete(todo.id)">删除</button>
        </li>
    </div>
</template>

<script>
    export default {
        name:'MyItem',
        //声明接收todo对象
        props:['todo','checkTodo','todoDelete'],
        methods:{
            // 勾选or取消勾选
            handleCheck(id){
                this.checkTodo(id);
            },
            //删除一个todo
            handleDelete(id){
                if(confirm("确定删除吗?")){
                    this.todoDelete(id);
                }
            }
        }
    }
</script>

<style scoped>
    /*item*/
    li {
        list-style: none;
        height: 36px;
        line-height: 36px;
        padding: 0 5px;
        border-bottom: 1px solid #ddd;
    }

    li label {
        float: left;
        cursor: pointer;
    }

    li label li input {
        vertical-align: middle;
        margin-right: 6px;
        position: relative;
        top: -1px;
    }

    li button {
        float: right;
        display: none;
        margin-top: 3px;
    }

    li:before {
        content: initial;
    }

    li:last-child {
        border-bottom: none;
    }

    li:hover{
        background-color: #ddd;
    }

    li:hover button{
        display: block;
    }
</style>